28667011 has 8 divisors (see below), whose sum is σ = 29690064. Its totient is φ = 27661920.

The previous prime is 28666987. The next prime is 28667017. The reversal of 28667011 is 11076682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28667011 - 2²³ = 20278403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28667017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201 + ... + 7666.

It is an arithmetic number, because the mean of its divisors is an integer number (3711258).

Almost surely, 2^28667011 is an apocalyptic number.

28667011 is a deficient number, since it is larger than the sum of its proper divisors (1023053).

28667011 is an equidigital number, since it uses as much as digits as its factorization.

28667011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28667011 is about 5354.1582905252. The cubic root of 28667011 is about 306.0512359563.

The spelling of 28667011 in words is "twenty-eight million, six hundred sixty-seven thousand, eleven".